CA2725037C - Audio amplifier and method for reconfiguring an audio amplifier - Google Patents

Audio amplifier and method for reconfiguring an audio amplifier Download PDF

Info

Publication number
CA2725037C
CA2725037C CA 2725037 CA2725037A CA2725037C CA 2725037 C CA2725037 C CA 2725037C CA 2725037 CA2725037 CA 2725037 CA 2725037 A CA2725037 A CA 2725037A CA 2725037 C CA2725037 C CA 2725037C
Authority
CA
Canada
Prior art keywords
signal
audio amplifier
impedance
output
audio
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CA 2725037
Other languages
English (en)
French (fr)
Other versions
CA2725037A1 (en
Inventor
Martin Maier
Josef Taffner
Josef Plager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CA2725037A1 publication Critical patent/CA2725037A1/en
Application granted granted Critical
Publication of CA2725037C publication Critical patent/CA2725037C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/3026—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being discontinuously variable, e.g. controlled by switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
CA 2725037 2008-07-09 2009-06-10 Audio amplifier and method for reconfiguring an audio amplifier Active CA2725037C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008040291A DE102008040291A1 (de) 2008-07-09 2008-07-09 Audioverstärker sowie Verfahren zur Umkonfiguration eines Audioverstärkers
DE102008040291.5 2008-07-09
PCT/EP2009/057204 WO2010003756A1 (de) 2008-07-09 2009-06-10 Audioverstärker sowie verfahren zur umkonfiguration eines audioverstärkers

Publications (2)

Publication Number Publication Date
CA2725037A1 CA2725037A1 (en) 2010-01-14
CA2725037C true CA2725037C (en) 2013-11-05

Family

ID=41000043

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2725037 Active CA2725037C (en) 2008-07-09 2009-06-10 Audio amplifier and method for reconfiguring an audio amplifier

Country Status (9)

Country Link
US (1) US9130512B2 (de)
EP (1) EP2301148B1 (de)
JP (1) JP5222401B2 (de)
CN (1) CN102089968A (de)
AT (1) ATE555542T1 (de)
CA (1) CA2725037C (de)
DE (1) DE102008040291A1 (de)
TW (1) TWI509986B (de)
WO (1) WO2010003756A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102412799B (zh) * 2011-11-24 2014-11-26 深圳Tcl新技术有限公司 音频放大器匹配声音负载的方法及装置
DE102012200524A1 (de) 2012-01-16 2013-07-18 Robert Bosch Gmbh Verstärkervorrichtung sowie Verfahren zum Aktivieren einer oder der Verstärkervorrichtung
GB2557750B (en) * 2013-10-23 2018-08-22 Cirrus Logic Int Semiconductor Ltd Class-D Amplifier Circuits
DE102014200968A1 (de) 2014-01-21 2015-07-23 Robert Bosch Gmbh Verstärkeranordnung mit Begrenzungsmodul
US9209767B1 (en) * 2014-05-28 2015-12-08 Motorola Solutions, Inc. Input current limited power supply and audio power amplifier for high power reproduction of nondeterministic signals
US9520843B2 (en) * 2015-01-05 2016-12-13 Music Group Ip Ltd Power amplifiers coupled in series
US10574212B2 (en) * 2017-11-21 2020-02-25 Mediatek Inc. Method and circuit for low-noise reference signal generation
DE102019208461A1 (de) * 2019-06-11 2020-12-17 Robert Bosch Gmbh Audiogeräteanordnung, Konfigurationseinrichtung, Verfahren und Computerprogramm
CN112911460A (zh) * 2019-11-19 2021-06-04 炬芯科技股份有限公司 音箱及其音效控制方法、音效控制系统
US11720318B2 (en) * 2021-12-17 2023-08-08 Motorola Solutions, Inc. Audio accessory with high and low impedance paths to a speaker, and a radio for the audio accessory

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721923A (en) * 1987-01-07 1988-01-26 Motorola, Inc. Radio receiver speech amplifier circuit
JPH01151310A (ja) * 1987-12-08 1989-06-14 Matsushita Electric Ind Co Ltd 電力増幅器
JPH02186812A (ja) 1989-01-13 1990-07-23 Alpine Electron Inc 音量自動調整装置
JPH03192907A (ja) * 1989-12-22 1991-08-22 Yamaha Corp 増幅器
JPH04129309A (ja) * 1990-09-19 1992-04-30 Matsushita Electric Ind Co Ltd 増幅回路
US5389829A (en) 1991-09-27 1995-02-14 Exar Corporation Output limiter for class-D BICMOS hearing aid output amplifier
US5532649A (en) * 1995-01-03 1996-07-02 Sahyoun; Youssef Y. Speaker resistance sensing and power limit setting circuit
JPH09130160A (ja) * 1995-08-30 1997-05-16 Sony Corp アナログ信号増幅装置及びオーディオ信号増幅装置
TW437161B (en) * 1995-08-30 2001-05-28 Sony Corp Audio signal amplifying apparatus
DE69935198T2 (de) * 1999-01-29 2007-10-31 Alcatel Lucent Leistungsverstärkervorrichtung
JP2002198756A (ja) 2000-12-27 2002-07-12 Pioneer Electronic Corp 電力増幅装置
US6765436B1 (en) 2002-09-04 2004-07-20 Cirrus Logic, Inc. Power supply based audio compression for digital audio amplifier
JP3922182B2 (ja) 2002-12-27 2007-05-30 ヤマハ株式会社 増幅回路
JP2005094144A (ja) * 2003-09-12 2005-04-07 Sharp Corp 音声信号増幅装置
JP2005223717A (ja) 2004-02-06 2005-08-18 Sharp Corp オーディオアンプ
JP4335767B2 (ja) * 2004-08-20 2009-09-30 フォスター電機株式会社 音響システム
JP4862820B2 (ja) * 2007-12-27 2012-01-25 ヤマハ株式会社 音響信号増幅装置
JP5233309B2 (ja) * 2008-02-19 2013-07-10 ヤマハ株式会社 Ｄ級電力増幅装置
JP5065982B2 (ja) * 2008-04-30 2012-11-07 Ｔｏａ株式会社 オーディオ用増幅装置
DE102008042377A1 (de) * 2008-09-25 2010-04-01 Robert Bosch Gmbh Audioverstärker mit Lastanpassung sowie Verfahren zur Lastanpassung des Audioverstärkers

Also Published As

Publication number Publication date
US20110128075A1 (en) 2011-06-02
TWI509986B (zh) 2015-11-21
TW201018082A (en) 2010-05-01
US9130512B2 (en) 2015-09-08
WO2010003756A1 (de) 2010-01-14
ATE555542T1 (de) 2012-05-15
EP2301148A1 (de) 2011-03-30
CA2725037A1 (en) 2010-01-14
CN102089968A (zh) 2011-06-08
EP2301148B1 (de) 2012-04-25
JP2011527170A (ja) 2011-10-20
DE102008040291A1 (de) 2010-01-14
JP5222401B2 (ja) 2013-06-26

Similar Documents

Publication Publication Date Title
CA2725037C (en) Audio amplifier and method for reconfiguring an audio amplifier
CA2725150C (en) Audio amplifier having load adjustment and method for the load adjustment of the audio amplifier
CN1284415C (zh) 音频再现设备和方法
EP2744103A1 (de) Differentieller Klasse H-Verstärker
KR102204505B1 (ko) 통합형 오디오 앰프를 위한 전원 제어 장치 및 방법
CN100350741C (zh) 电源提供功率的动态分配及信号的频率捷变频谱滤波
KR101124802B1 (ko) 전력 배율기 장치 및 방법
JPH11346120A (ja) 高効率電力増幅装置
CN215187382U (zh) 扩音器设备
US6816007B1 (en) Amplifier with dynamic rail control drive circuit
US20220385256A1 (en) Electronic circuit for amplifiers and sound devices for the transfer of electric power between channels
JP4604396B2 (ja) 音声出力制御回路
KR20030096847A (ko) 포켓형 보청기 회로
JP4453284B2 (ja) ディジタルアンプ
US20210211099A1 (en) Minimizing idle channel noise in a class-d pulse width modulation amplifier
KR100714524B1 (ko) 호환형 음성 증폭장치 및 그 증폭장치를 갖는이동통신단말기
JP2005033349A (ja) ディジタルアンプ及びこれを用いたオーディオ再生装置
JPH0411380Y2 (de)
JP2010154209A (ja) ディジタルアンプ

Legal Events

Date Code Title Description
EEER Examination request
MPN Maintenance fee for patent paid

Free format text: FEE DESCRIPTION TEXT: MF (PATENT, 16TH ANNIV.) - STANDARD

Year of fee payment: 16

U00 Fee paid

Free format text: ST27 STATUS EVENT CODE: A-4-4-U10-U00-U101 (AS PROVIDED BY THE NATIONAL OFFICE); EVENT TEXT: MAINTENANCE REQUEST RECEIVED

Effective date: 20250603

U11 Full renewal or maintenance fee paid

Free format text: ST27 STATUS EVENT CODE: A-4-4-U10-U11-U102 (AS PROVIDED BY THE NATIONAL OFFICE); EVENT TEXT: MAINTENANCE FEE PAYMENT PAID IN FULL

Effective date: 20250603